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A tree stands vertically on a hill side which makes an angle of `15^0` with the horizontal. From a point on the ground 35 m down the hill from the base of three, the angle of elevation of the top of the tree is `60^0` . Find the height of the tree.

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RD SHARMA ENGLISH-SINE AND COSINE FORMULAE AND THEIR APPLICATIONS-All Questions
  1. In any triangle A B C , prove that: (b-c)/(b+c)=(tan((B-C)/2))/(tan((B...

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  2. In any triangle A B C , prove that: acos((B-C)/2)=(b+c)sin(A/2)

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  3. A tree stands vertically on a hill side which makes an angle of 15^0 w...

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  4. A person, standing on the bank of a river, observes that the angle sub...

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  5. The angle of elevation of to be top point P of the vertical tower PQ o...

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  6. The elevation of a tower at a station A due North of it is alpha and ...

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  7. If in a Delta A B C ,\ /A=45^0,\ /B=60^0,\ a n d\ /C=75^0 , find the ...

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  8. If in any Delta A B C ,\ /C=105^0,/B=45^0, a=2, then find bdot

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  9. In Delta A B C ,\ if\ a=18 ,\ b=24\ a n d\ c=30\ a n d\ /C=90^0 find ...

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  10. In any triangle A B C , prove that following : (a-b)/(a+b)=(tan((A-B)/...

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  11. In any triangle A B C , prove that following : (a-b)cosC/2\ = csin((A-...

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  12. In any triangle A B C , prove that following : c/(a-b)=(tan(A/2)+tan(B...

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  13. In any triangle A B C , prove that following : c/(a+b)=(1-tan(A/2)tan(...

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  14. In any triangle A B C , prove that following :(a+b)/c=(cos((A-B)/2))/(...

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  15. In any triangle A B C , prove that following: sin((B-C)/2)=(b-c)/a cos...

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  16. In any triangle A B C , prove that following: (a^2-c^2)/(b^2)=("sin"(A...

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  17. In any triangle A B C , prove that following: \ bsinB-csinC=asin(B-C)

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  18. In any triangle A B C , prove that following: \ \ a^2sin(B-C)=(b^2-c^2...

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  19. In any triangle A B C , prove that following: \ a(sin B-sin C)+b( sin ...

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  20. In any triangle A B C , prove that following: \ (a^2"sin"(B-C))/(sin A...

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